Safety appliance for presses.



F. S. ALIANO.

SAFETY APPLIANCE FOR PRES'SES. APPLICATION FILED APiL I, 1913'.

1 1 89, 1 86 Patented June 27, 1916.

M il IE' UNITED STATES PATENT OFFICE.

FRANK S. ALIANO, OF NEW' YORK, N. Y.

SAFETY APPLIANCE FOR PRESSES.

Application filed April 7, 1913. Serial No. 759,292.

T 0 all whom it may concern:

Be it known that I, FRANK S. ALIANO, a citizen of the United States, residing in the borough of Brooklyn, in the city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Safety Appliances for Presses, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

My invention relates to safety appliances for presses, and more particularly to such an appliance whereinthe protecting guard is automatically actuated to prevent the hand or arm of the operator being injured by the punch or ram. I

The main object of my invention is to provide an appliance of this character wherein the actuating means for the protective guard will be controlled by the punch, thus insuring synchronism in the operation of the press and of the guard. 7

A further object is toprovide such an appliance wherein the guard will be brought to the protective position toward the initiation of the operative movement of the punch, and will be held in this position until said punch has completed its power stroke.

A still further object is to provide such an appliance wherein the guard will be held in the protective position until the punch has returned to, or almost to, the normal position, thus compelling the operator to impart the full stroke to the punch upon each actuation of the press, while affording a sufficient interval for feeding between strokes.

A still further object is to provide a safety appliance of this character which will be actuated through and during the descent of the punch under conditions which will prevent development of such velocity in any movement of the guard as will injure the operator, or hold his or her hand in a position where it can be injured by the punch or the die carried thereby.

A still further object is to provide an appliance of this character wherein the guard may be adjusted to vary its operative moment, or to compensate for any adjustment of the punch. And a still further object is to provide an appliance of this character wherein the speed of operation of the guard will be synchronized with that of the press, thus avoiding any loss of efliciency in the press.

Specification of Letters Patent.

Patented June 27, 1916.

The invention consists primarily in a safety appliance for presses embodying therein a guard disposed between the punch and the operator, a vibratory member, con nections between said member and said guard, and a reciprocatorymember movable by or in accordance with the punch, and acting upon said vibratory member whereby said guard will be set during the initial movement in the descent of said punch, and in such other novel features of construction and combination of parts asare hereinafter set forth and described, and more particu larly pointed out inthe claimshereto appended. v

Referring to the drawings z Figure 1 is a perspective view of a foot press having my safety appliance attached thereto; Fig. 2 is a plan view thereof; Fig. 3 is a detail view on a larger scale, of the vibratory member and a part of its connections, partly broken away; and Fig. 4 is a detail view of the connection between the reciprocatory rod and its connection with the punch, also broken away.

Like letters refer to like parts throughout the several views.

In the embodiment of my invention illustrated in the drawings, 1 have shown it upon a well known type of pendulum foot press in which the frame is shown at a; the head at b the bolster at 0; and the punch, ram or slide at (Z. This punch (Z is actuated by the pendulous, vibratory foot lever e.

Mounted on the bolster 0, between the punch (Z and the operator, is a rock shaft 7 having secured thereto a protective guard plate 9 which is adapted to move upwardly and toward the operator so as to force the hand away from the punch during or toward the initiation of the power stroke thereof. This shaft 7 is preferably mounted in vertically adjustable studs 7 f topermit the raising or lowering thereof and of the plate 9 in adjusting it to a die, and said shaft has a crank hat one end thereof through which the plate 9 receives a timely actuation or oscillation.

Mounted upon the frame a adjacent the base of the head 72, is a frame i having mounted thereon an oscillatory bell crank lever j, one arm 7" of which is connected by means of the link 70 with the crank arm h, thus transmitting movement from said bell crank lever to the guard 9. To time the actuation of the said bell crank lever to synchronize its oscillations or vibrations with the movements of the punch (Z, I actuate said lever through means carried by or acting simultaneously and in unison with said punch. In the form of the invention shown, this means comprises an arm m secured to the punch, ram or slide (Z by means of the bolt or bolts m so as to cause said arm to reciprocate therewith. Carried by this arm is a vertically reciprocating rod 11, slidably mounted in the enlarged pivot 0 carried by the arm j of the bell crank lever j, said rod having free movement in said pivot. The upper end of this red passes through and is secured to a pivot p, parallel with the pivot 0, the means of connection being such (as a set screw 22) that this rod may be adjusted vertically to regulate the operative moment of the guard or to compensate for any adjustment of that portion of the punch carrying the arm m. I mount the rod in these two pivots in order to afford two points of support therefor and thus cause it to have the desired lineal movement while permitting that slight play thereof which is necessary by reason of the are described by the lever arm 7' in actuating the guard.

Mounted upon the arm 9' of the lever j is a contact stud g which preferably has mounted thereon an anti-friction roller g, this roller being positioned below, and to one side of, the pivot p and projecting in the path of the rod n so as to bring a portion of the circumference thereof below said rod and cause the impact of said rod therewith to oscillate the lever j. The end of the rod n is normally spaced slightly above this contact member, although, if desired, it may be brought into direct contact therewith, any

clearance between said rod and said contact member resulting in a dwell between the initiation of the power stroke of the punch (Z and the actuation of the guard. To insure a quick return of the bell crank lever j to its normal position after the disengagement of the rod 71 therefrom, I provide a spring 7 one end of which is attached thereto and the other end of which is attached to the arm m, or if desired, to any other part of the machine. This spring is normally in tension, and acts merely as supplemental means for insuring a return movement of the bell crank lever j and the guard plate 9. If desired, however, this spring may be dispensed with.

The operation of the herein described appliance is substantially as follows :Under normal conditions, the plate 9 will lie perfectly flat in a plane parallel with, and below, the plane of the die upon the bolster 0. The blank is fed across this plate upon said die and the pendulous vibratory lever e is then used to actuate the punch (Z. As the said punch descends, it carries with it the arm m and rod 92., causing the lower end of said rod to act upon the contact roller g and in its position when it has oscillated to the.

full extent. The roller 9 acts merely as an anti-friction device, thus avoiding thenccessity for oiling the machine at this point. As the lever j oscillates, the link is connected with the arm j thereof, will, through the crank it, oscillate the shaft f and raise the guard g upwardly and toward the operator. If at this moment the operators hand is not free of the die or in a position where it cannot be injured by the punch the movement of this guard plate 9 will besuch as to physically remove, or force the hand away from said punch. If the operator for any desires to check the descent of said punch he may do so by merely holding the guard against upward movement, thus through the actuating mechanism for the guard plate checking the movement of said punch. The continued engagement of the rod 12 with the roller 9 will hold the guard in the raised position until after the completion of the full power stroke of the punch, and during the return movement thereof, until the rod 12 passes the horizontal diameter of the roller 9, whereupon the lever j' will return to its normal position either automatically, through gravity acting upon the arm j and guard plate 9, or through such action com bined with the action of the spring '1". The pivots 0 and 29 having parallel axes, will guide the rod or in its vertical reciprocatory movement while at the same time permitting that slight oscillatory movement of said rod incidental to following the are described by the lever arm j as the lever j is oscillated.

The appliance may be readily applied to various types of presses, and adjusted to suit any die, the adjustability of the rod 72 in its pivot 7) permitting that oscillation of the lever j resulting from the adjustment in height of the studs f 7, so as to secure the desired timing of the actuation of the guard g.

It is not my intention to limit the inven tion to the precise details of construction, or to use in connection with the type of press, shown in the accompanying drawings, it being apparent that the construction of the appliance may be varied, and its use extended to different types of machines, without departing from the spirit and scope of the invention.

Having described my invention, what I claim as new and desire to have protected by Letters Patent, is:

l. A safety appliance for presses embodying therein a guard normally disposed between the punch and the operator, pivotally.

supporting means for said guard whereby it may have movement about a horizontal axis, a vibratory member, connections between Said member and said guard, and a reciprocatory member movable synchronously with the punch and acting upon said vibratory member, whereby said guard will be set during the initial movement in the descent of said punch, ram or slide.

2. A safety appliance for presses embodying therein a guard normally disposed between the punch and the operator, pivotal supporting means for said guard whereby it may have movement about a horizontal axis, a vibratory member, connections between said member and said guard, and a reciprocatory member movable synchronously with the punch and acting upon said vibratory member, whereby said guard will be set during the initial movement in the descent of said punch, and means carried by said vibratory member whereby said guard will be held set until the end of the power stroke of said punch.

3. A safety appliance for presses embodying therein a shaft disposed between the punch and the operator, a guard mounted thereon, a crank on said shaft, a bell crank lever, connections between one arm of said lever and said crank, a reciprocatory member movable synchronously with the movement of the punch, and a contact carried by the other arm of said lever and adapted to be engaged by said member, whereby said guard will be set during the initial movement in the descent of said punch.

4. A safety appliance for presses embodying therein a shaft. disposed between the punch and the operator, a. guard mounted thereon, a crank on said shaft, a bell crank lever, connections between one arm of said lever and said crank, a bearing carried by the other arm of said lever, a reciprocatory member movable synchronously with the movement of said punch, and a contact carried by said bell crank lever below said bearing and adapted to be engaged by said member, whereby said guard will be set during the initial movement in the descent of said punch.

5. A safety appliance for presses embodying therein a guard disposed between the punch and the operator, pivotal supporting means for said guard whereby it may have movement about a horizontal axis, a vibratory member, connections between said member and said guard, a reciprocatory member movable synchronously with the punch and acting upon said vibratory member, whereby said guard will be set during the initial movement in the descent of said punch, and supporting means for said reciprooatory member whereby it is permitted to oscillate to compensate for the movement of said vibratory member:

6. A safety appliance for presses, embodying therein a shaft disposed between the punch and the operator, a guard mounted thereon, a crank on said shaft, a bell crank lever, connections between one arm of said lever and said crank, a. pivotal bearing carried by the other arm of said lever, an arm carried by and movable with the punch, a pivot in said arm, a rod, one end of which is secured to said last named pivot and the other end of which is slidably mounted in said pivotal bearing, and a contact carried by said bell crank lever below said pivotal bearing, and adapted to be engaged by said rod, whereby said guard will be set during the initial movement of said punch.

7. A safety appliance for presses embodying therein a guard normally disposed between the punch and the operator, pivotal supporting means for said guard whereby it may have movement about a horizontal axis, a vibratory member, connections between said member and said guard, a reciprocatory member movable synchronously with the punch and acting upon said vibratory member, whereby said guard will be set during the initial movement in the descent of said punch, and means whereby said reciprocatory member may be adjusted to vary the operative interval of said vibratory member.

8. A safety appliance for presses, embodying therein a shaft disposed between the punch and the operator, a guard mounted thereon, a crank on said shaft, a bell crank lever, connections between one arm of said lever and said crank, a pivotal bearing carried by the other arm of said lever, an arm carried by and movable with the punch, a pivot in said arm, a rod, means whereby one end of said rod is adjustably secured to said last named pivot, the other end of said rod being slidably mounted in said pivotal bearing, and a contact carried by said bell crank lever below said pivotal bearing and adapted to be engaged by said rod, whereby said guard will be set during the initial movement of said punch.

9. A safety appliance for presses embodying therein a shaft disposed between the punch and the operator, a guard mounted thereon, a crank on said shaft, a bell crank lever, connections between one arm of said lever and said crank, a pivotal bearing carried by the other arm of said lever, an arm carried by and movable with the punch, a pivot in said arm, a rod, one end of which is secured to said last named pivot and the other end of which is slidably mounted in said pivotal bearing, a contact carried by said bell crank lever below said pivotal bearing, and adapted to be engaged'by said rod, whereby said guard will be set during the initial movement of said punch, and a spring acting to restore said bell crank lever to normal.

10. A safety appliance for presses embodying therein a shaft disposed between the punch and the operator, means whereby said shaft may be vertically adjusted, a guard mounted upon said shaft, a crank on said shaft, a bell crank-lever, connections between one arm of said lever and said crank, a pivotal bearing carried by the other arm of said lever, an arm carried by and movable with the punch, a pivot in said arm, a rod, means whereby one end of said rod is adjustably secured to said last named pivot, the other end of said rod being slidably mounted in said pivotal bearing, and a contact carried by said bell crank lever below said pivotal bearing and adapted to be engaged by said rod, whereby said guard will be set during the initial movement of said punch.

11. A safety appliance for presses embodying therein a movable guard and actuating means therefor comprising an oscillatory lever, a pivotal bearing carried thereby, a rod adapted to be carried by the punch,

mounted in said pivotal bearing, a fixed 25 FRANK S. ALIANO Witnesses:

CLARIQE FRANGK, EUGENE VVENING;

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

